Please listen and give opinion!

We are selling 3 tomorrow morning and I want to keep 3 girls (didn't get video of 1). These all started going through a voice change and I think they sound like they have a honk, start of a quack? The 4th video has the most dramatic change so far. Do these sound like girls or do boys sound like this at start of voice change too? I want to pick the right 3 to keep!!!!